A Master’s Fidelity (GQ 2.5), A Vital Chemistry (GQ 3.5), and A Free Choice (GQ 4.5) are now $0.99 from ebook retailers. A Superior Slave (GQ 0.5) is still free from those same retailers. All four stories are still available to read/download for free on AO3.
What that $0.99 buys a reader is a pretty cover, pretty chapter headings, and everything formatted the way I want it to look.